Natively, JIRA allows Worklog creation through WORK ON ISSUE Permission.
Minyaa Suite introduces an additional permission to extend this initial permission ... 
When Minyaa Time is enabled, a Worklog can be created by a user if he has
- the permission to Update the Worklog (EDIT WORLOG Permission),
- And has the permission to Create Old Worklog.
This permission to Create Old Worklog is evaluated in following cases :
- the user has not the Project Administration Permission
- and the WorkableDelay ("Worklog.Create.Delay.In.Days" in Application Properties) is positive.
The condition is evaluated as follow :
- Today is not older than EOM-1M+nD (End Of Last Month + n Days), where n is provided by the WorkableDelay parameter.
The WorkableDelay ("Worklog.Create.Delay.In.Days" in Application Properties) may be modified through the Minyaa Settings page.